Die for making bolts



(No Model.)

S T L M we m A M .R m E I D Patented Feb. 10, '1891.

A TTORNEYS UNITED STATES PATENT OFFICE.

THOMAS J. BUSH, OF LEXINGTON, KENTUCKY.

DIE FOR MAKING BOLTS.

SPECIFICATION forming part of Letters Patent No. 446,281, dated February10, 1891.

Application filed May 2,1890. Serial F0. 350,343. (No model.)

To all whmn it may concern.-

Be it known that I, THOMAS J. BUSH, of Lexington, in the county ofFayette and State of Kentucky, have invented a new and Improved Machinefor Making Bolts, of which the following is a full, clear, and exactdescription.

My invention relates to making interlocking bolts such or substantiallysuch as are shown in my patent of September 19, 1882, No. 264,622; andthe invention consists of a machine comprising a die and a punch ormandrel constructed to face off and recess the end of the bolt to form alocking-shoulder, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the views.

Figure 1 is a sectional elevation of the anvil and punch or mandrel,showing the formation of a bolt. Figs. 2 and 3 are transverse sectionalviews on the lines 0: 0c and y y, respectively, of Fig. 1.- Fig. 4 is aperspective view of the punch or mandrel, and Fig. 5 is an enlargedperspective view of the lower end of the bolt.

A represents a die formed with a seat A to receive the rod of metal fromwhich the bolt Bis to be formed. The said seat A is covered, as at A anda die is recessed at A to form a guide for the punch or mandrel C; butthe cover A may be omitted, if desired. The punch or mandrel is formedat its lower edge with a slant or bevel c to face off one side of thebolt, as at b. This slant is terminated abruptly by the recess 0, whichforms the shoulder 0 that makes the offset b in the bolt. At the side'ofthe recess 0 is formed the projection 0 which forms the recess b in thebolt. I

In operation a plain bar of metal is placed in the seat of a die and thepunch or mandrel is lowered upon it and heavy pressure is applied to it,so that the bolt is not only shaped but subjected to heavy compression,so that its strength is not materially decreased by the reduction insize incident to its formation.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is

The mandrel C, formed with a sloping surface c, recess a, and project-ion a to be used in connection with a die formed with a seat for theblank and an aperture for the mandrel, substantially as described.

THOMAS J. BUSH. lVitnesses:

H. A. Wnsr, O. SEDGWICK.

